CVE-2019-19920 : What You Need to Know
Learn about CVE-2019-19920, a vulnerability in sa-exim 4.2.1 allowing unauthorized command execution. Find out the impact, affected systems, exploitation details, and mitigation steps.
An exploit in sa-exim 4.2.1 allows unauthorized command execution by creating a .cf file or a rule. The vulnerability stems from Greylisting.pm using eval instead of direct parsing or the taint feature, similar to CVE-2018-11805.
Understanding CVE-2019-19920
This CVE involves a security vulnerability in sa-exim 4.2.1 that enables attackers to execute arbitrary code under specific conditions.
What is CVE-2019-19920?
- The vulnerability in sa-exim 4.2.1 allows malicious actors to run unauthorized commands by creating a .cf file or a rule.
- The issue arises from Greylisting.pm's use of eval instead of direct parsing or the taint feature.
- This vulnerability is comparable to CVE-2018-11805.
The Impact of CVE-2019-19920
- Malicious individuals can exploit this vulnerability to execute unauthorized commands.
- Successful exploitation could lead to arbitrary code execution on the affected system.
Technical Details of CVE-2019-19920
This section provides more in-depth technical information about the CVE.
Vulnerability Description
- An exploit in sa-exim 4.2.1 allows attackers to execute unauthorized commands by creating a .cf file or a rule.
- The vulnerability is due to Greylisting.pm using eval instead of direct parsing or the taint feature.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Version: Not applicable
Exploitation Mechanism
- Attackers can exploit this vulnerability by creating a .cf file or a rule to execute unauthorized commands.
Mitigation and Prevention
Protecting systems from CVE-2019-19920 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply security updates and patches promptly.
- Monitor for any unauthorized changes or activities on the system.
Long-Term Security Practices
- Implement proper input validation to prevent code injection attacks.
- Regularly review and update security configurations and policies.
Patching and Updates
- Stay informed about security advisories and updates related to sa-exim to apply patches as soon as they are available.